Table 2- 12 Baud Rate/Character Frame (Ascii Driver) - Siemens Simatic S7-300 CP 341 User Manual

Baud rate/Character frame
The table below contains descriptions of and specifies ranges of values for the relevant
parameters.
Table 2- 12 Baud rate/Character frame (ASCII driver)
Parameters Description
Baud rate Data transmission rate in bps (baud)
Notes:
A maximum of 19200 baud is possible for the 20mA-TTY interface.
Start bit During transmission, a start bit is prefixed to each character to be
sent.
Data bits Number of bits to which a character is mapped.
Stop bits During transmission, the stop bits are appended to every character
to be sent; this signals the end of a character.
Parity A sequence of information bits can be extended to include another
bit, the parity bit. The addition of its value ("0" or "1") brings the
value of all the bits up to a defined state. This improves data
integrity.
"No" parity means that no parity bit is sent.
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01
www.gkbpx.com
Basic Principles of Serial Data Transmission
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2.8 Configuration data
Range of values Default value
300
• 9600
600
•
• 1200
2400
•
• 4800
9600
•
• 19200
38400
•
• 57600
76800
•
115200
•
1 (fixed value)
7
• 8
• 8
1
• 1
2
•
None
• Even
Odd
•
Even
•
89